Lining for ball or pebble mills.



H. A. HANSEN & `LM. scHMUEsE.

LINING FOB BALL 0B. PBBBLB MILLS.v I

APPLICATION YILED FEB. 1, 191,3. 1,083,400, Patented Jan.6,1914

2 SHEETS-HEEFT 1.

,M my ,q l I f d@ l* Q Ai m QA. .I Q i Q m' m /ww GWW H. A. HANSEN J. M.SCHMUESER.

LINING FOB BALL 0R PEBBLE MILLS.

APPLIOLTOI FILED PEB. l) 1913.

i Patented Jan. 6, 1914.

2 SHEETS-SHEET 2.

.United States, residing at the city UNITED srnfrnsrnirnnr ruiten.,`

HANS A. HAN-SEEN AND JOSEPH M. SCHMUESER, OF SMUGGLER, COLORADQ LININGFOR BALL OR PEBIBLE MILLS.

Specification of Letters Patent.

Patented Jan. 61,1914.A

T 0 all 'Lc/10m 'it may concern:

Be it known that we, HANS A. HANSEN- and JOSEPH M. SCHMUESER, citizensof th o Smuggler, county of San Miguel, and State of Colorado, haveinvented certain new and useful Improvements in Linings for Ball orPebble Mills; and we do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing' had to the accompanying drawings, and to the letters and gures ofreference marked thereon, which form a part of this specification.

Our invention relates to improvements in linings for ball or pebblemills and has for f one of its objects to provide units of such acharacter that it will be possible to speedily assemble the liningwithin a mill.

Another object is toprovide a construction in which the use of largenumbers of bolts or screws for holding the lining in plac'e is renderedunnecessary.

A further object of the invention is to provide means, namelylongitudinal ribs integral with the units, for preventing slippa'ge ofthepebbles or'balls upon the lining, thtis prolonging the life of thelining, preventing iiattening of the pebbles or`balls and avoiding wasteof power.

Other objects of the invention will appear hereinafter as' we proceedwith the description of that embodiment, which forthe purposes of thepresent application, we have illustrated in the accompanying drawings,in which:`

Figure 1 is a central longitudinal sectional view of a mill providedwith our improved lining. Fig. 2 is a view in detail of one of the unitsof our lining. Fig. 3 is a similar View of another unit. Figi/1 is asimilar view of still another unit. Fig. 5 isA a plan vie'vsr in detailof the door lining. Fig. 6 is a cross section taken upon the line 6-6,Fig. l, and looking in the direction of the arrow., Figs. 7, 8, and 9are detail views of the different' units of a modified form of lining.

Fig. 10 is a detail view of two units of a modification in which eachsidev edge is beveled in two different direct-ions.

The same reference characters refer to like'parts throughout the views.v

In the drawings, which .form a part of this specification the numbers 5,6 and v7 parts, respectively, of the casing of a pebble or ball mill.The casing is supported upon and secured to hol-low trunnions 8 and' 9which have collars 10 and 11, fixed thereupon to cooperate with thejournals (not shown) for preventing longitudinal movement thereon.

' rEhe casing is first provided with a number of strips of belting 12up'on the inside,- and running completely around the casing. After thebelting 12 has been secured in place, ce-

ment 13 is spread over the remaining' exn'posed parts of the casing onthe inside, the thickness of the cement layerlb'eing the same as that ofthe belting.

A hollow en'd support 14 is nextinserted within the trunnion` 9,theshoulder 15 on' said support abutting against the shoulder 16 uponthe trunnion, thus preventing the support from bein moved outwardly.The' support 14 has a at wall 17 which acts` as an abutment for theouter extremities of the lining units 18. These' units are madeconcave-convex, their outer surfaces being of a curvature similar tothat of the casing against which they rest. The side edges 19 of theseunits are inclined towardthe middle in planes which if extended wouldinclude the axis of the mill. K

Two of the units, namely 18a and 18b have their adjacent edges beveledofi' inwardly and away from each other as at- 20 and 21 (see Fig. 6)'.When the other units" have been set in place a unit 18 isv inserted be'-tween the units 18u and 18" vand is caused to exert a we'dging' actionagainst'both of the latter, the u'nit 18C'b'e'ing drawn outwardly inassembling the parts by mea-ns of a nut 22 upon a screw bolt 23, the'head of which is mounted in the unit 18c the n'ut 22v bearing upon theexterior surface of .the casing* whereby the unit 18c is secured to thecasing. 'It will apparent that the1unitf18c acts as a lrey to hold allof the other' units in position, the units 18 beingv formed and`,arranged like the stones in a masonry arch, their contacting radialedges preventing" the movement of any unit toward the middle of the"mill. Each of the units 18, 18, 18"' and 18, is provided along one edge'.with an integral inwardly extending rib' 27, designed to' catchtheballs or pebbles as they' are thrown a aiist the linjinlg, during the,peration o' the mill and t u's overcome slip'- page.

refer to the two conoidal and the cylindrical In the preferred form ofour invention each of the ribs 27 is located upon one edge casing and alining piece 24 with ribs upon its inner face constituting continuationsof the ribs upon the units which are cut away as aforesaid is fastenedto the door by means fao of a screw bolt,25 passed .through an opening26 in the door lining piece.

The lining for the cylindrical portion 6 of the casing is next put inplace, this lining element consisting of units 28 having ribs 29 of thesame cross sectional proportions as the ribs 26 and formingcontinuations of the latter when the lining is assembled. Locking unitssimilar to the units 18a, 18", and 18, are employed but they have notbeen illustrated in detail as their construction is precisely analogousto that of the similar units of the 18 group. With the wedgin unit, wemay use a bolt fastening 22, 23, utl in the preferred form we omit thisas unnecessary.

The lining for the portion 5 of the casing is now assembled. It consistsof units 30 having ribs 31, the units being locked in place by meanssimilar to those for the units 18 and 28, a yscrew bolt 32 and a nut 33being employed for drawing the Wedge unit into place. When the latter isset, the beveled end edges together with the beveled end edges of theunits 18, overhang the end edges of the units 28 holding each of thelatter including the wedging `unit, in place. These end edges are forced1nto close union and are held there by small wooden or steel wedges 34,which are driven in between the outer extremities of the units 30 andthe adjoining wall of an end supporting collar 35 which is held inposition by screws 36 or other suitable fastenings, but if desired, allfastenings for the collar 35 may be omitted, the wedging action beingsuicient to hold it in place.

The mill may be revolved in any suitable manner as by means of a gearwheel 37, fastened by means of bolts 38 to a coneshaped collar 39secured upon the trunnion 8 and to the casing 5.

Although we prefer that the ribs upon the lining units shall be locatedat one edge thereof as shown in Figs. 1, 2, 3, 4 and 6, we do not desireto be limited to this construction, as numerous other arrangements maybe used as for instance, the ribs may be located inthe middle of theunits as illustrated in Figs. 7, 8`and 9. Furthermore, nu-

merous forms of interlocking edges may be employed if desired. In Fig.10, we have illustrated one such arrangement one edge of each unitbeingdivided into two oppositely inclined portions 40 and 41 while thecorresponding portions of the opposite edge are inclined oppositely asat 42 and 43, the inclined surfaces 40 and 42 being parallel and theinclined surfaces 41 and 43 being parallel. It will be. evident thatwhen such units are assembled no one of them can move -in a directionperpendicular to 1ts surface by reason of the fact that it will beoverlapped, on a portion of each side edge by the units adjacentthereto.

The materials of which our lining units mayl be constructed are more orless numerous, but we suggest that chilled cast iron, chrome steel,manganese steel,I white or gray or hematite iron will be foundsatisfactory.

In view of the foregoing disclosure, it is believed that the method ofassembling and putting into operation our improved lining will beobvious without further explanation.

We claim as our invention:

l. In a ball or pebble mill, a casing symmetrically arranged' withrespect to all planes assing through its axis and a lining of harmaterial composed of units held in place by wedging action, each of thesald units having integral therewith an inwardly extending rib arrangedlongitudinally of the mill, said rib being located upon one edge of theunit the vside edges of said units being formed to lie in planes throughthe axis of the mill when the units are assembled, means insertedbetween two of said units for retaining the units in close engagementwith each other, said last named means being secured to the casing.

2. In a ball or pebble mill, a casing formed of two coneshaped portionsarranged with their bases toward each other and a cylindrical portioninterposed therebetween, a lining of hard material composed ofconcavo-convex units substantially triangular in shape and adapted to beheld in position in the coneshaped portions of the casing by one wedgein each cone, concavocnvex lining units, substantially rectangular inshape and adapted to be held in place in the cylindrical portion` of thecasing by one wedge and overhanging extremities upon certain of thetriangular shaped units for retaining in place the last named wedge.

3. In a ball or pebble mill, a casing formed of two coneshaped portionsarranged with their bases toward each other and a cylindrical portioninterposed therebetween, 'a lining of hard material composed ofconcave-convex units substantially triangular in shape and adapted to beheld in position in the coneshaped portions of the casing by one wedgein each cone, concavoconvex lining units, substantially rectangular inshape and adapted to be held in place vtures in presence of twoWitnesses. in the cylindrical portion of the casing by HANS A. HANSEN.one Wedge the adJacent extremltles of the 5 triangular and rectangularunits being bev- JOSEPH M" SCHMUESER' eled to t each other and theresulting plane Witnesses: of juncture overhanging the rectangular AULIGNBERG,

units whereby theyare locked in place. y E. B. ADAMS.

In testimony whereof We ax our signa-

